In one court filing, Trump acknowledges that he sometimes exaggerates, but still insists that O'Brien's estimation "caused (Trump) to lose out on future deals in locales from Philadelphia to Kiev," according to the Wall Street Journal.

Trump added that determining his net worth is complicated because, like his awful hair, it's constantly in flux -- and depends partly on his feelings.

"My net worth fluctuates, and it goes up and down with markets and with attitudes and with feelings, even my own feeling," Trump told lawyers in a 2007 deposition, according to the Journal.

Lawyers for both sides were in court Monday. O'Brien's lawyers were arguing that the lawsuit should be dismissed. Trump seems to have higher hopes, boasting that O'Brien's publishers "will pay me hundreds of millions of dollars," the Journal reported.

Think of all the weak beauty pageants you could own with that kind of money.